Worst heroic fight of the tier??

Just some background. My guild is 11/16 heroic 10 man. So I have not personally seen every single fight but I've seen enough kill videos and streams to make my judgement. I don't mind going to farm nights and getting alts some gear as I enjoy most of the fights, however I really really hate spirit kings. It's been on farm for a couple months now and Iguess I just hate every mechanic. I just find it boring. Move out of this. Stack for that. Stop dps. Dispel shields.

What is the worst heroic fight of this tier?? Purely based on opinion...

Ambershaper, aka my guild destroyer. Personal responsibility of the MC was just too hard for ~3 of our raiders and after 2 months of little progression we just ended it. Side note: Vizier was super fun to progress and learn.

I believe Vizier took my group the most attempts to get down the first time. It's not bad once you get over the hump and make it farm content, but get ready to pull it until your eyes bleed for that first kill.

H Spirit Kings pre set rotation. 1/5 attempts being viable sucked. H Garajal first week was rough, but not bad (or 'worst'). Amber shaper is probably my most hated fight on farm at the moment. I guess I'll find out how bad H Sha is soon

heroic sha isn't really that bad, it is definitely too long of a fight, but i felt like p2 though simple was pretty interesting, I did feel like the dps requirements should have been higher in p2, it is a bit of a pushover as long as the adds die. As a boss fight, it was ok, but as an end boss to the tier, it should have been better.